Find the error: Bangladesh has Ph.D’s in a large number.

In a

Number

Ph.D’s

None of these

"In a" is incorrect; it should be "in large numbers" for proper usage.

The correct sentence is: Bangladesh has Ph.D.’s in large numbers.

بنگلہ دیش میں بڑی تعداد میں پی ایچ ڈی ہیں۔