How do you say these numbers and dates?

1. 321

• a. three hundred and twenty-one
• b. three hundreds twenty-one

2. Liverpool 3–Chelsea 0 (football score)

• a. Liverpool three–Chelsea zero
• b. Liverpool three–Chelsea nil

3. 01902 (phone code)

• a. nought one nine nought two
• b. oh one nine oh two

4. 40–0 (tennis score)

• a. forty–love
• b. forty–nil

5. 7 May (date)

• a. the seventh of May
• b. the seven of May

6. 1999 (year)

• a. one thousand nine hundred and ninety-nine
• b. nineteen ninety-nine