The initial step in the activation of ovum during the process of fertilisation is \( \quad B H U...

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The initial step in the activation of ovum during the process of fertilisation is \( \quad B H U 2000 \)
(a) formation of the fertilisation cone
(b) fertilizin-antifertilizin reaction
(c) penetration of sperm in the egg
(d) formation of the fertilisation membrane
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