A)
B)
C)
D)
Correct Answer: D
Solution :
Explanation: Options (a) is incorrect as it is only supplied with electricity from one battery. Option (b) is incorrect as it is a series circuit where the electricity is shared by all the bulbs. Options (c) and (d) are parallel circuits where the bulbs are connected to the batteries by separate paths. However, the electricity flowing in each path in option (c) is shared between two bulbs arranged in series. These bulbs will not be as bright as the bulbs in option (d). Hence option (d) will have the brightest bulbs.
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