Point out the correct difference between primary sexual characteristics and secondary sexual characteristics.

The correct option is A Primary sexual characteristics - inborn characteristics i.e. reproductive organs; Secondary sexual characteristics - develop in lifetime like growth of facial hair

Primary sexual characteristics are the ones we are born with or the inborn characteristics like, the reproductive organs. Whereas, secondary sexual characteristics are the ones that develop in the lifetime of an individual as they mature, examples include growth of facial hairs in boys and development of mammary glands in girls.