If P = a × m × r and Q = b × m × 2 × r, where a, b, m, rare odd primes. then the HCF of P and Q is:

Correct option is D

Given:

P = a × m × r and Q = b × m × 2 ×r

a, b, m, r are odd primes

Solution:

​HCF of P PP and Q Q is the product of their common factors​

P = a × m × r 

Q = b × m × 2 × r 

​$$\text{HCF} = m \times r$$​​