The number 90 is to be written as a product of its prime factors .Which one of the following is correctA.90=2*5*9B.90=2*3*3*5C.90=3*5*9D.90=4*5*9

To solve the question, we need to find the prime factorization of 90.

Start with the number 90.
The smallest prime number that divides 90 is 2, so divide 90 by 2: 90 ÷ 2 = 45
Now, 45 is an odd number, so it is not divisible by 2. The next smallest prime number is 3. Divide 45 by 3: 45 ÷ 3 = 15
Next, divide 15 by 3 again: 15 ÷ 3 = 5
Now, 5 is a prime number, so we stop here.
The prime factorization of 90 is 2 × 3 × 3 × 5.

Therefore, the correct option is: B. 90 = 2 × 3 × 3 × 5