Ekadhikena poorvena sutra is applicable for multiplication when sum of  last digits isA.     10B.     50C.     150D.     NONE OF THESE

To solve this question, we need to understand the concept of the "Ekadhikena Poorvena" sutra. This sutra is a Vedic mathematics technique used for multiplication.

According to the sutra, when the sum of the last digits of two numbers is 10, we can apply this technique to simplify the multiplication process.

Now, let's analyze the options given:

A. 10: The sum of the last digits is 0, not 10. Therefore, the sutra is not applicable.

B. 50: The sum of the last digits is 0, not 10. Therefore, the sutra is not applicable.

C. 150: The sum of the last digits is 0, not 10. Therefore, the sutra is not applicable.

D. NONE OF THESE: Since none of the options have a sum of the last digits equal to 10, the sutra is not applicable for any of them.

Therefore, the correct answer is D. NONE OF THESE.