‎CSIR-JRF/DBT-JRF/GATE-LIFE SCIENCES ASPIRANTS

A mammalian cell has a double stranded DNA of 1.2 meter which duplicates in 4hrs. If it duplicates at the rate of 20μmeter/min, how many origins of replication are there in the DNA?
(A) 2500
(B) 250
(C) 25
(D) 1