Step 1: Understanding the Concept:
The zodiac (Rāśi Cakra) is a circular belt of $360^{\circ}$ divided into 12 signs of $30^{\circ}$ each. These signs have a fixed, unchangeable sequence that mirrors the apparent path of the Sun throughout the year. Every student of Jyōtiṣa must memorize these signs in their correct order as they form the coordinate system for all planetary movements.
Step 2: Detailed Explanation:
The standard list of the first five zodiac signs is:
1. Mēṣa (Aries): The first sign, ruled by Mars. Represented by the ram. (Labeled A).
2. Vṛṣa (Taurus): The second sign, ruled by Venus. Represented by the bull. (Labeled E).
3. Mithuna (Gemini): The third sign, ruled by Mercury. Represented by the twins. (Labeled B).
4. Karka (Cancer): The fourth sign, ruled by the Moon. Represented by the crab. (Labeled D).
5. Siṃha (Leo): The fifth sign, ruled by the Sun. Represented by the lion. (Labeled C).
To arrange the letters provided in the question according to this 1-2-3-4-5 sequence:
- 1st is A (Mēṣa)
- 2nd is E (Vṛṣa)
- 3rd is B (Mithuna)
- 4th is D (Karka)
- 5th is C (Siṃha)
The resulting sequence is A, E, B, D, C. This order is significant because it defines the elemental cycle (Fire-Earth-Air-Water) and the mode cycle (Movable-Fixed-Dual). For example, Aries is Fire/Movable, Taurus is Earth/Fixed, Gemini is Air/Dual, and Cancer is Water/Movable. This repeating pattern of qualities creates the diverse matrix of interpretations used in Falit Jyōtiṣa.
Step 3: Final Answer:
The correct natural order of the signs is A, E, B, D, C.