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Consider the following statements:

A body weighs less at the equator than at the poles because:                        [NDA]

1. earth rotates about its axis.

2. the ice cap at the poles increases gravitational pull.

3. equatorial diameter is greater than the polar diameter.

4. of some unknown facts.

Which of the statements given above is/are incorrect?

A) 1 and 2            

B) 3 only

C) 1 and 3         

D)      4 only