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# Which of the following is the alarm phermone spread by bees?

$(a)\;\text{Citral} \\ (b)\;\text{isosmyl acetate} \\(c)\;\text{Citronellant} \\ (d)\;\text{hydrasine}$

If a person is strong ley a bee, it does not take very long for the other bees to come to the same place and string the person.
Actually , the first bee has spread alarm pheromones, isosmyl acetate which help in attracting to the other bees.
Hence b is the correct answer.