The strongest muscles in the human body are found in the:

In a $A$ state,the edge of thin filaments on either side of thick filaments $B$ overlap the free ends of $C$ filaments leaving the central part of thick filaments. This central part of thick filament,not overlapped by thin filaments is called $D$ zone.
Choose the correct options to fill the gaps $A, B, C$ and $D$,so as to complete the given $NCERT$ statement.

Which type of muscle is multinucleated during its functional state?

Choose the correct option for the following:
Biceps $\quad$ Iris $\quad$ Heart

Striated muscle fibers are found in......

The belly is the ...... of a muscle.