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An ideal constant current source is connected in series with an ideal constant voltage source. Considering together, the combination will be a—
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- Constant voltage source
- Constant current source
- Constant voltage and current source or a constant power source
- Resistance
- Constant voltage source
Correct Option: B
According to question 
Suppose we want to calculate the net current which passes through RL by using superposition theorem.
Case 1: When current source is taken. The equivalent circuit for this case is shown below— 
Case 2: When voltage source is taken. The equivalent circuit for this case is shown below— 
Thus, we conclude that the net current is due to current source only.
Therefore, we can say that when an ideal constant current source is connected in series with an ideal constant voltage source, considering together the combination will be a constant current source.
