Number of chromosomes in a human cell is

26
40
42
46

The correct answer is (d). A human cell has 46 chromosomes, 23 from each parent. These chromosomes are found in the nucleus of the cell. They are made up of DNA, which is the genetic material that contains the instructions for how the cell works.

(a) is incorrect because a human cell has 46 chromosomes, not 26.
(b) is incorrect because a human cell has 46 chromosomes, not 40.
(c) is incorrect because a human cell has 46 chromosomes, not 42.