What are the things start with "M" One thing is looking different. What is that ?

1. What are the things start with "M"

2. There is one thing which is in 3 different shapes. What is that ?

3. There are some pairs in this pic. What are they ?

4. One thing is looking different. What is that ?

1. Mango, Man, Map, Moon, Mug, Magnet, Mobile, Mouse, Mud, Monkey (If you find more, Comment below)
2. Hat
3. Lock and Key, Bat and Ball
4. Mug of Water with 2 Handles