Which one of the following compounds when reacted with $$\mathrm{NaOH}$$ (aq) undergoes Substitution Nucleophilic Bimolecular reaction with retention of configuration?




A statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following options.
Assertion: The Eclipsed and the Staggered conformations of Ethane continuously flip from one form to the other.
Reason: The torsional barrier between the Conformers of Ethane has a high value of about $$50 \mathrm{~kJ} / \mathrm{mol}$$ and this restricts free rotation around $$\mathrm{C}-\mathrm{C}$$ bond.
Match the Hormones listed in Column I with their characteristics listed in Column II
No. | Hormone | No. | Characteristics |
---|---|---|---|
A | Adrenal Cortex | P | Mediates responses to external stimuli. |
B | Epinephrine | Q | Steroid hormone. |
C | Estrogen | R | Iodinated derivative of Tyrosine amino acid. |
D | Throxine | S | Its malfunction causes Addison's disease. |
Identify the product [D] formed when Reactant [A] $$(M M 78 \mathrm{~g} / \mathrm{mol})$$ undergoes the series of reactions shown