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| List $I$ | List $I$ |
| $A$ $P$ wave | $I$ Heart muscles are electrically silent. |
| $B$ $QRS$ complex | $II$ Depolarisation of ventricles. |
| $C$ $T$ wave | $III$ Depolarisation of atria. |
| $D$ $T-P$ gap | $IV$ Repolarisation of ventricles. |
Choose the correct answer from the options given below :
$(i)$ Neurospora, which is used in biochemical and genetic work is a member of this class.
$(ii)$ They are mostly multicellular, e.g., Yeast, or rarely unicellular, e.g., Penicillium.
$(iii)$ They are saprophytic, decomposers, parasitic or coprophilous.
$(iv)$ Some examples are Aspergillus, Claviceps and Neurospora.