MCQ
Which layers of microspirengia protect as functionally and help to release pollen from anther ?
- AEndothecium
- BEpidermis
- CMiddle layer
- ✓All of the above
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$I.$ This method is also known as biolistic technique
$II. $ In this method cells are bombarded with high velocity micro-particles of gold or tungsten coated with $DNA$ in plants
$III.$ Important crop plants like maize, rice and wheat have now been transformed by this method
Which of the statements given above are correct?

| Column $I$ | Column $II$ |
| ($a$) Ovary | ($i$) Human chorionic Gonadotropin |
| ($b$) Placenta | ($ii$) Estrogen and Progesterone |
| ($c$) Corpus Iuteum | ($iii$) Androgens |
| ($d$)Leydig cells | ($iv$)Progesterone only |