Which among the following is/are most energy efficient?
A. Incandescent bulb
B. Fluorescent tubelight
C. Compact fluorescent lamp
D. All of the above
Answer: Option C
A. Incandescent bulb
B. Fluorescent tubelight
C. Compact fluorescent lamp
D. All of the above
Answer: Option C
A. aluminium
B. iron
C. stainless steel
D. copper
A. Rutt
B. Stella Saundaraja
C. Crang and Rush
D. Mary Jean Alexander
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