$A$ person who does hard manual work with his hands is likely to develop:

  • A
    Thick subcutaneous fat in his palms
  • B
    Thick epidermis on his palms
  • C
    Greater number of sweat pores on his hands
  • D
    Greater quantity of melanin all over the body

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$A$ substance responsible for making the $stratum \text{ } lucidum$ cells of the epidermis of the skin of a rabbit transparent is:

Slough is

In the old age of man,the skin gets wrinkled because of:

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