The correct option is C The cow as well as the calf
Section 163 of the Indian Contract Act, 1872 states "Bailor entitled to increase or profit from goods bailed. In the absence of any contract to the contrary, the bailee is bound to deliver to the bailor, or according to his directions, any increase or profit which may have accrued from the goods bailed." Hence, If Ram leaves a cow in the custody of Shyam be taken care of and the cow gets a calf, Shyam is bound to deliver the cow as well as the calf to Ram.