Explain why danger signals are made of red colour ?

In these question, a statement of asertion followed by a statement of reason is given .Choose the correct answer out of the following choices: Assertion and reason both are correct statements and reason is correct explanation for assertion. Assertion and reason both are correct statements but reason is not correct explanation for assertion. Assertion is correct statement but reason is wrong statement. Assertion is wrong statement but reason is correct statement. Assertion:Danger signals aer made of red colour. Reason:Velocity of red light is maximum and thus more visibility in dark.

Why are halogens coloured ?

Why are halogens coloured ?

Explain why hydrogen peroxide is stored in coloured plastic bottles ?

Why are dnger signals red in colour?Give reason.