To solve this problem, we need to identify which functions are NOT under the control of thyroid hormones. Let's analyze each option:$\newline \bullet$A. Maintenance of water and electrolyte balance:$\newline$ - Thyroid hormones do not directly regulate water and electrolyte balance. This is primarily controlled by hormones like aldosterone and antidiuretic hormone (ADH).$\newline \bullet$B. Regulation of basal metabolic rate:$\newline$ - Thyroid hormones are crucial for regulating the basal metabolic rate (BMR). They increase the metabolic activity of most tissues.$\newline \bullet$