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| Swollen leaf base | - | Pulvinus |
| Lamina | - | Green expanded part of leaf |
| Trimerous | - | The floral appendages are in multiple of 5 |
| Rachis | - | Represents the midrib of the leaf |
Assertion $A$: Endometrium is necessary for implantation of blastocyst.
Reason $R$: In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium.
In the light of the above statements, choose the correct answer from the options given below: