Statement-I     The product of two irrational numbers is irrational.
Statement-II     If a and b are relatively prime numbers, then their L.C.M is 1.

Statement –I
The product of two irrational number is may (or) may not be irrational.
Ex:  $\sqrt{2} \times \sqrt{2} =2$
∴ statement D is wrong
Statement –II
If a, b relatively prime number their L.C.M = 𝑎𝑏 Statement-II is wrong