List out the following Bahmani rulers in chronological order and mark the correct choice :

1. Alauddin Bahman Shah
2. Muhammad Shah III
3. Ahmad Shah
4. Firuz Shah

Aestivation is seen in 

Choose the correct answer from the codes given below.

Assertion (A) : The pyramid of grassland ecosystem is upright.

Reason (R) : The producers are maximum in number and tertiary consumers are least in number.

Which of the following is correct

1. The term systole refers to 
2. Phase of contraction of lungs.
3. Phase of relaxation of lungs.
4. Phase of relaxation of heart.
5. Phase of contraction of heart.

The velocity of sound is maximum in 

A particle executes S.H.M. The acceleration of the particle is maximum