The choice of verbs

[svetik]

Could you please tell me which of these sentences is better.
Can I use all three verbs in this context?
Are there other ways to express the same thought? Thank you

1. I obtained my Diploma in Management
I earned my Diploma in Management.
I achieved my Diploma in Management.
2. I finished my studies in 2002.
I completed my studies in 2002.

[bhaisahab]

Could you please tell me which of these sentences is better.
Can I use all three verbs in this context?
Are there other ways to express the same thought? Thank you

1. I obtained my Diploma in Management
I earned my Diploma in Management.
I achieved my Diploma in Management.
2. I finished my studies in 2002.
I completed my studies in 2002.

They are all ok.