Correct Answer - Option 1 : 5
Calculation
From the option
So let first prime no. is 5
then another prime no.s are 7, 11, 13
Product of 1st 3 prime no. = 385
⇒ 5 × 7 × 11 = 385
satisfy the condition
Product of last 3 no. = 1001
⇒ 7 × 11 × 13 = 1001
This condition is also satisfied
∴ The first prime no. is 5