18.04.1-Ubuntu: Mail command unable to set mail body with attachment

I am trying to use mail command to send 2 attachments. The issue which i am facing is unable to send attachment and mail body content. tried following command

echo "Hello World" | mail -s 'Test Email' -A test.csv -aFrom:no-reply@test.com abcd@test.com

cat README.txt | mail -s 'Test Email' -A test.csv -aFrom:no-reply@test.com abcd@test.com

mail -s 'Test Email' -A test.csv -aFrom:no-reply@test.com abcd@test.com < README.txt

Whereas I send mail body alone then mail is received with body

mail -s 'Test Email' -aFrom:no-reply@test.com abcd@test.com  < README.txt

How to send both attachment and mail body (README.txt in mail body and test.csv in attachment)?