Question

53. Placenta is the organ that provides exchange of nutrients and waste products between mother and fetus. This
develops by
(A) First month
(B) Third month
(C) Fifth month
(D) Seventh month​

Answer 1

Answer:

(B) Third month i.e 12 weeks.

Answer 2

Explanation:

Work is said to be done when a force moves an object through a distance in its own direction.