Do you agreed that cell is a building unit of organism yes explain why?class 9​

It can be, but not really

Explanation:

This is because cells can be the building block of an organism, e.g. humans, but they can also be their own separate organism, such as a bacteria.

where is the option.let me know

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."