In the M.2 interface standard, which card slot standard does NOT support a card measurement of 2230?

In the M.2 interface standard, which card slot standard does NOT support a card measurement of 2230?

• A
• B
• M
• E 

EXPLANATION

While the A, B, and E style card slots each support cards with a measurement of 2230 (22mm wide, 30mm long), the M style does not.
Source: Arstechnica