a) 25
b) 120
c) 260
d) 480
Answer: b
Explanation: The given word contains 5 letters, all different.
∴ Required number of ways
$$\eqalign{
& = 5! \cr
& = \left( {5 \times 4 \times 3 \times 2 \times 1} \right) \cr
& = 120 \cr} $$
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