● A sino-atrial (SA) node is a group of cells located in the wall of the right atrium of the heart. The SA node is considered the pacemaker of the heart.

● The SA node generates an electrical signal that causes the upper heart chambers (atria) to contract. The signal then passes through the AV (atrioventricular) node to the lower heart chambers (ventricles), causing them to contract or pump.

• Due to fierce campaign and lobbying of Raja Rammohan Roy and others, Sati practice was formally banned in all the lands under Bengal Presidency by Lord William Bentinck on 4 December 1829.

• By this regulation, the people who abetted sati were declared guilty of “culpable homicide.

● Godavari does not flow into the Arabian Sea. Godavari empties into Bay of Bengal through its extensive network of tributaries.

● Rivers flowing into the Bay of Bengal: Brahmaputra, Yamuna, Ganga, Meghna, Mahanadi, Godavari, Krishna, and Kaveri.

● Rivers flowing into the Arabian Sea: Narmada, Tapi, Sabarmati, and Purna.

3+2+4 = 9, 9+1 = 10, 10² = 100

8+1+3 = 12, 12+1 = 13, 13² = 169

1+2+3 = 6, 6+1 = 7, 7² = 49

9+1+2 = 12, 12² = 144

Thus, option D does not follow the above pattern.

Hence, option D is the correct answer.

 The possible Venn–diagram is:

I. Some S are Q – it is not a definite case, hence false
II. Some Q are P – it is a definite case, hence true
III. Some R are S – it is a definite case, hence true.

Hence, the correct option is B.

Given : Lengths of the diagonals of a rhombus are 24 cm and 18 cm

Area of the rhombus =  =

We are given that the quadrilateral PQRS is cyclic.

So we know the sum of opposite angles of cyclic quadrilateral is 180°.

So we have

∠P + ∠R = 180° …….. eq 1

∠S + ∠Q = 180° ……… eq 2

Given that:

∠P = 4 ∠R

∠S = 3 ∠Q

We have from eq1

And

Also by eq2

And

Sum = Q + R = 45° + 36° = 81°

Let’s understand the meaning of given phrasal verbs:

Look into : to investigate or find out more about something

Look out for : try to notice something or keep an eye out for something in particular

Look down : to feel that someone is less important

Look after : to take care of someone or something

Some people have a great interest in reading books. They always try to keep an eye on good books;

thus “look out” is the appropriate choice for the blank.

Hence option B is the correct answer.

The idiom ‘pull someone’s leg’ means ‘to joke with someone playfully; to tease someone’.

For example :- I love pulling my sister's leg—it's almost too easy to annoy her.

Hence, option D is the correct answer.

• The given sentence is in Direct Speech because it quotes actual words. Therefore, it must be changed into Indirect Speech.
  
  
• We notice that the reporting verb is in the Past tense (‘said’). Hence, a change will be made in the tense of the reported speech. It will change from the present continuous tense to the past continuous tense.
  
  
• Also, the first person of the reported speech is changed according to the subject of reporting speech.

Therefore, the sentence in Indirect Speech will be: Anbu told Suresh that Priya was playing in the garden.

Hence, option A is the correct answer.