Required Minimum Distribution Penalty

After Maria reaches age 73, she fails to take her required minimum distribution (RMD) from her traditional IRA. What is the consequence under current tax law?

1. A 25% excise tax on the amount not withdrawn
2. A 70% excise tax on the amount not withdrawn
3. A 10% penalty plus ordinary income tax
4. No penalty if she corrects it by the next tax year