Excretion

Step 1: Understanding the Concept: The Glomerular Filtration Rate (GFR) represents the total volume of filtrate formed by both kidneys per unit of time.
Step 2: Key Formula or Approach: Recall the standard physiological value of GFR for a healthy adult human as stated in standard biology curricula.
Step 3: Detailed Explanation: In a healthy adult human, the kidneys filter blood to produce urine continuously.
The normal value for GFR is approximately 125 milliliters per minute.
This translates to roughly 180 liters of filtrate generated per day (125 ml/min 60 min 24 hours).
The option stating 125 ml/minute exactly matches this established physiological standard.
Step 4: Final Answer: The correct option is (1).