The microscope in cell studies — practice question

Which of these lengths have the same value as $1\,\mu\text{m}$?\n\n1 $1000\,\text{mm}$\n2 $0.001\,\text{nm}$\n3 $0.001\,\text{mm}$\n4 $1\,000\,000\,\text{nm}$\n5 $0.01\,\text{mm}$\n6 $1000\,\text{nm}$

• A1 and 4
• B2 and 5
• C3 and 4
• D3 and 6