Please choose the correct ending to complete the given sentence: Health: [header] How to tell if you're going bald [title] Take a good hard look at your head in the mirror. [step] Just because you see hair on your pillow or in the shower drain, doesn't mean you're going bald. Look at the hair on your head.

Ending1: Make sure it's about shoulder length. If it's not, make sure it's not too short. Ending2: If you have fine and straight hair, that means a normal-sized pin prick won't hurt your head. If your hair is clean and straight, however, it means a good sized dose of cervical cleaner will change the shape and direction of your hair. Ending3: If it is uneven, your hair will be thicker and lighter. If it is removable, you'll see hair pulling down. Ending4: Receding hair lines may be a sign you're " going bald. " patchy hair loss may be associated with other causes.

Answer format: ending1/ending2/ending3/ending4