Digital formula of both limbs in man is

Options

A. 2,3,3,4,3
B. 2,3,3,3,3
C. 3,3,3,3,2
D. 2,2,3,3,3

Answer

To determine the digital formula of both limbs in humans, we need to analyze the structure of the human hand and foot. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Structure of the Human Hand
- The human hand consists of 5 digits (fingers).
- Each finger has three phalanges (bones) except for the thumb, which has two phalanges.

### Step 2: Count the Phalanges in One Hand
- For the four fingers (index, middle, ring, little), each has 3 phalanges:
- 4 fingers × 3 phalanges = 12 phalanges
- The thumb has 2 phalanges:
- 1 thumb × 2 phalanges = 2 phalanges
- Total phalanges in one hand = 12 + 2 = 14 phalanges.

### Step 3: Understand the Structure of the Human Foot
- The human foot also consists of 5 digits (toes).
- Similar to the hand, each toe has three phalanges except for the big toe, which has two phalanges.

### Step 4: Count the Phalanges in One Foot
- For the four toes (second, third, fourth, fifth), each has 3 phalanges:
- 4 toes × 3 phalanges = 12 phalanges
- The big toe has 2 phalanges:
- 1 big toe × 2 phalanges = 2 phalanges
- Total phalanges in one foot = 12 + 2 = 14 phalanges.

### Step 5: Combine the Digital Formula for Both Limbs
- Since both the hands and feet have the same structure in terms of phalanges:
- Hand: 2 (thumb) + 3 (index) + 3 (middle) + 3 (ring) + 3 (little) = 2 3 3 3 3
- Foot: 2 (big toe) + 3 (second toe) + 3 (third toe) + 3 (fourth toe) + 3 (fifth toe) = 2 3 3 3 3
- Therefore, the digital formula for both limbs is:
- Hands: 2 3 3 3 3
- Feet: 2 3 3 3 3

### Final Digital Formula
- The complete digital formula for both limbs in humans is:
- **2 3 3 3 3 (for the hand) and 2 3 3 3 3 (for the foot)**.