Consider the following physiological stages of wheat.
1. CRI
2. Seedling
3. Tillering
4. Ear emergence
The correct sequence of the above physiological stages is

Wheat growth can be physiologically divided into several stages:
Germination or emergence, tillering, stem elongation, boot, heading, or flowering, and last one grain-fill or ripening.
Seedling is the first stage of growth in wheat that occurs after germination and begins when the first true leaves emerge.
CRI is the crown root initiation stage that mostly happens 21 days after sowing.
Tillering is lateral branches that happen 40 - 45 days after sowing.
The heading stage also known as ear emergence stage begins when the ear emerges from the flag leaf sheath and continues until the entire ear has emerged.
So, the correct sequence should be seedling, CRI, tillering followed by ear emergence.