LDR sensor works on the principle of

A. Resistivity प्रतिरोधकता

B. Photoconductivity फोटोकंडक्टिविटी

C. Conductivity प्रवाहकत्व

D. Both (A) and (C) (A)और (C)दोनों

Correct Answer is :

B. Photoconductivity